An improved understanding of the thermo-fluid dynamic phenomena that occur during the combustion process in boosted spark ignition engines is necessary for future developments in these engines. In particular, increased understanding of flame kernel evolution is fundamental since the initial growth of the flame contributes significantly to cycle-to-cycle variation in engine performance and emissions. In this work, flame inception and early stages of the combustion process were investigated in an optically accessible single-cylinder ported fuel injection engine. This engine was equipped with the cylinder head of new generation spark ignition turbocharged engine with the same characteristics as the research engine. Cycle-resolved visualization was applied to follow the flame propagation from the spark ignition to the flame kernel growth. A retrieval procedure for the optical data was realized to obtain information about the flame radius evolution. Natural emission spectroscopy in the ultraviolet–visible wavelength range allowed the detection of the chemical markers of the combustion process such as CH, OH, and HCO radicals, and formaldehyde molecules.

    In-cylinder optical investigations were correlated with engine parameter measurements obtained by conventional methods.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Optical investigations of the early combustion phase in spark ignition boosted engines


    Contributors:
    Tornatore, C (author) / Sementa, P (author) / Merola, S S (author)


    Publication date :

    2011-06-01


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Optical investigations of the early combustion phase in spark ignition boosted engines

    Tornatore,C. / Sementa,P. / Merola,S.S. et al. | Automotive engineering | 2011



    Optical Investigations of the Abnormal Combustion in a Boosted Spark-ignition PFI Engine

    Vaglieco, B. M. / Tornatore, C. / Sementa, P. et al. | SAE Technical Papers | 2009


    Boosted Current Spark Strategy for Lean Burn Spark Ignition Engines

    Ting, David / Li, Liguang / Zheng, Ming et al. | SAE Technical Papers | 2018


    Fundamental approach to investigate pre-ignition in boosted spark ignition engines

    Zadeh,A. / Rothenberger,P. / Nguyen,W. et al. | Automotive engineering | 2011